Here,　aiming　at　problems　of　rubber　fatigue　aging,　easy　leakage　of　damping　fluid　and　difficult　accurate　design　of　stiffness　and　damping　of　traditional　dynamic　vibration　absorber　in　large　aspect　ratio　cutter　bar,　a　multilayer　stacked　permanent　magnet　dynamic　vibration　absorber　using　magnetic　stiffness　and　eddy　current　damping　to　provide　stiffness　and　damping　was　designed　to　realize　independent　and　accurate　design　of　stiffness　and　damping.　The　unique　stacked　structure　could　provide　larger　magnetic　stiffness　and　eddy　current　damping　under　the　same　volume　to　ensure　the　permanent　magnet　dynamic　vibration　absorber　reaching　the　optimal　vibration　reduction　conditions.　Theoretical　calculation　models　of　magnetic　stiffness　and　eddy　current　damping　in　the　multi-layer　permanent　magnet　dynamic　vibration　absorber　were　established,　respectively.　Relations　among　magnetic　stiffness,　eddy　current　damping　and　size　parameters　of　each　part　of　the　permanent　magnet　dynamic　vibration　absorber　were　explored　by　using　MATLAB　software　and　Maxwell　electromagnetic　simulation　software.　Finally,　MATLAB　software　was　used　to　simulate　and　analyze　a　cutter　bar　with　permanent　magnet　dynamic　vibration　absorber　and　a　solid　cutter　bar　with　equal　sizes.　The　results　showed　that　the　maximum　value　of　FRF　amplitude　of　the　cutter　bar　with　permanent　magnet　dynamic　vibration　absorber　decreases　by　91.1%.　©　2022,　Editorial　Office　of　Journal　of　Vibration　and　Shock.　All　right　reserved.